<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      
      <el-table :data="roleList" border stripe>
        <!-- 展开列 -->
         <el-table-column type="expand">
            <template slot-scope="scope">
              <el-row :class="['bdbottom',i1 === 0? 'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                <!-- 渲染一级权限 -->
                <el-col :span="5">
                  <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <!-- 渲染二级和三级权限 -->
                <el-col :span="19">
                  <!-- 渲染所有的二级权限 -->
                  <el-row :class="[i2 === 0 ?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                    <el-col :span="6">
                      <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <el-col :span="18">
                      <el-tag type="warning" v-for="(item3,i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                          {{item3.authName}}
                      </el-tag>
                    </el-col>
                  </el-row>
                </el-col>
              </el-row>
              <!-- <pre>
                {{scope.row}}
              </pre> -->
            </template>
         </el-table-column>
        <!-- 索引列 -->
         <el-table-column type="index">
         </el-table-column>
         <el-table-column label="角色名称" prop="roleName">
         </el-table-column>
         <el-table-column label="角色描述" prop="roleDesc">
         </el-table-column>
         <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-deit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
         </el-table-column>
      </el-table>
    </el-card>

    
    <!-- 分配权限的对话框 -->
    <el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVisible"
  width="50%"  @close="setRightDialogClosed">
  <!-- 树形空间 -->
  <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights" >确 定</el-button>
  </span>
</el-dialog>
  </div>


</template>

<script>
export default {
    data() {
      return {
        // 所有角色列表数据
        roleList: [],
        // 控制分配权限对话框的显示与隐藏
        setRightDialogVisible: false,
        rightsList: [],
        treeProps: {
            label: 'authName',
            children: 'children'
        },
        // 默认选中的节点数组
        defKeys: [],
        roleId : ''
      }
    },
    created() {
        this.getRolesList()
    },
    methods: {
      async getRolesList(){
        const {data:res} =  await  this.$http.get('roles')
        if(res.meta.status !== 200){
            return this.$message.error('获取角色列表失败')
        }
        this.roleList = res.data
        console.log(this.roleList)
      },
      async removeRightById(role,rightId){
        // 弹窗提示
        const confirmResult =  await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)

        if(confirmResult !== 'confirm'){
           return this.$message.info('取消了删除')
        }
        // this.$message.info('确认了删除')
        const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if(res.meta.status !== 200){
            return this.$message.error('删除权限失败')
        }
        this.$message.success('删除权限成功')
        // this.getRolesList()
        role.children = res.data
      },

// 展示分配权限的dialog
      async showSetRightDialog(role){
      this.roleId = role.id
      // 获取所有权限的数据
          const {data:res} = await  this.$http.get('rights/tree')
          if(res.meta.status !== 200){
             return this.$message.error('获取权限失败')
          }
          // 把获取到权限的数据保存到data
          this.rightsList = res.data
          // console.log(this.rightsList)
          // 递归获取三级节点的id
          this.getLeafKeys(role,this.defKeys)
           this.setRightDialogVisible = true

      },
      // 通过递归的形式，获取三级权限id
      getLeafKeys(node,arr){
      // 如果node节点不包含chidren属性，则是三级节点
          if(!node.children){
               return arr.push(node.id)
          }

          node.children.forEach(item => {
              this.getLeafKeys(item,arr)
          })
      },
      setRightDialogClosed(){
          this.defKeys = []
      },
      // 为角色分配权限
       async allotRights(){
         const keys = [
         ...this.$refs.treeRef.getCheckedKeys(),
         ...this.$refs.treeRef.getHalfCheckedKeys()
         ]
         console.log(keys)
         const idStr = keys.join(',')
         const {data:res}  = await  this.$http.post(`roles/${this.roleId}/rights`,{rids: idStr})
         if(res.meta.status !== 200){
            return this.$message.error('分配权限失败')
         }
         this.$message.success('分配权限成功')
         this.getRolesList()
         this.setRightDialogVisible = false
      }

    },


}
</script>

<style lang="less" scoped>
    .el-tag{
      margin: 7px;
    }
    .bdtop{
       border-top: 1px solid #eee;
    }
    .bdbottom{
       border-bottom: 1px solid #eee;
    }
    .vcenter{
       display: flex;
       align-items: center;
    }
</style>